type: The same type as T,
but with any top level volatile-qualifier removed.

C++ Standard Reference: 3.9.3.

Compiler Compatibility: If the compiler
does not support partial specialization of class-templates then this template
will compile, but the member type
will always be the same as type T
except where compiler
workarounds have been applied.

Header:#include<boost/type_traits/remove_volatile.hpp>
or #include<boost/type_traits.hpp>